4 Bolton, New Brachiopoda and Mollusca. 



valves are also shorter in proportion to their width, and 

 the ears are more nearly equal. It gives me great 

 pleasure to name this species after Mr. Robert Cairns, of 

 Ashton-under-Lyne, who has for many years been a 

 diligent student of Lancashire geology. 



Anthracomya bellula, sp. nov. (PL 5, f. 5). 



Modiola Macadami, C. Dugdale, " General Section of 

 the Lower Coal Measures and Millstone Grit 

 Rocks of Rossendale" {Trans. Manch. Geol. Soc, 

 Vol. XIX., 1887, p. 228). 



Diagnosis : Shell transversely oblong ; narrowest in 

 the region of the umbones; slightly expanded posteriorly, 

 ventral margin sub-parallel to the hinge line. Umbones 

 moderately tumid, almost touching, placed far forwards 

 at anterior fifth of length. Lunule small. Anterior end 

 of valves produced, narrow, acutely rounded. The 

 diagonal ridge almost obsolete, lost on the convexity of 

 the shell before reaching the ventral margin. Ventral 

 margin but slightly rounded. Posterior border sloping 

 obliquely upwards. Surface of shell smooth, marked by 

 faint concentric lines of growth, which broaden out over 

 the posterior third of the shell. 



Localities and Horizons : Bonfire Hill, Crawshawbooth; 

 in dark shales immediately under the lower rough-rock 

 of the millstone-grit series. 



Bankside Quarry, Bacup ; in shales under rough- 

 rock. Not now exposed. 



Greens Clough, on the moorland between Bacup and 

 Portsmouth ; in shale under rough-rock. 



Observations : Only three specimens of this species 

 have been seen by me, although more have been found. 

 The specimens now in the Manchester Museum are so 

 well preserved that no doubt need exist as to their specific 

 identity. 



